Abstract: A copying machine operable in a manual copying paper feed mode and an automatic copying paper feed mode which has an automatic paper feeding section and an inlet for receiving copying paper inserted manually. The automatic paper feeding section includes a cassette containing copying paper to be fed automatically, a feed roller for feeding the copying paper, and a lifting mechanism for lifting the copying paper for pressure contact with the feed roller. The inlet has a cover which is opened for manually inserting copying paper, and a guide member for guiding the copying paper to a position between the feed roller and the copying paper contained in the cassette. The manual feed mode is automatically switched to the automatic feed mode when the manually fed copying paper is exhausted and the cover remains closed for a predetermined time during the manual feed mode.

Abstract: A preset counter apparatus for copying machines and the like having respective keys corresponding to digit positions of units and tens and a display for displaying numerical value in the digit positions of units and tens. The preset counter apparatus is so controlled that a value "0" is automatically displayed in the units digit position when the key corresponding to the tens digit is initially activated and that a value previously set in the units digit position is maintained as it is regardless of the posterior activation of the key corresponding to the tens digit.

Abstract: An image forming apparatus including an electrostatic latent image support member, a device for forming the electrostatic latent image on the support member, first and second developing devices for containing first and second developers, respectively, first and second prevention devices for preventing developing operations of the first and second developing devices, respectively, a region designating device for designating, in the electrostatic latent image, first and second regions to be developed by the first and second developers, respectively and a control device for actuating the first and second prevention devices in response to a signal from the region designating device so as to prevent the developing operations of the first and second developing devices.

Abstract: A copying machine provided removably with plural developing units containing different colors of toner. Control unit of the copying machine detects the loading condition of the developer and inhibits the start of copying operation when at least one developing unit is not loaded into the copying machine. The control unit further performs a quick toner supply control, a control for a request for change-over of a developing unit being supplied with toner, and a control for the indication of a residual quantity of toner. The developing unit change-over control is performed so that a developing unit drive mechanism is changed over after the developer so far used is recovered into the developing unit.

Abstract: An image forming apparatus has plural developing units which perform image forming operations with use of either one of the developing units.The image forming apparatus includes a counting arrangement for counting a respective number of times of use of the plural developing units or with respect to each of the colors of developers contained in the plural developing units. A developing unit is selected having the highest frequency in use among the developing units when the image forming apparatus is brought into the initial mode thereof.

Abstract: A paper size selecting device for use in a recording apparatus loadable with paper of different sizes selectively, which includes a detector for detecting the size of paper loaded in the apparatus, selecting key for selecting a desired size and a plurality of display members provided for the respective sizes of paper loadable in the apparatus. Each of the display members indicates that the paper of the size concerned is loaded in the apparatus as well as that the paper of the size concerned has been selected by the selecting key.

Abstract: A copying apparatus reduces the possibility of copying error by displaying the copying parameters in different modes. The copying parameters include, for example, the number of copies, the paper size, and the magnification. Since the copying parameters may vary from one copying job to the next, the copying apparatus includes a standard set of copying parameters which are preferably displayed by using continuous lights. After the completion of a copying job, the copying parameters are displayed using intermittent lights, if the copying parameters are different from the set of standard parameters. The intermittent lights provide the next operator of the copying apparatus with an indication that the copying parameters are different from the set of standard parameters.

Abstract: An image forming apparatus includes first and second devices selectively operable for developing an electrostatic latent image on a photosensitive member, toner accommodating devices for accommodating developer, detecting devices for detecting toner density in each of developers, a judging device for judging whether the first and second developers have same color, a selecting device responsive to the detecting device and judging device for automatically selecting the second developing device in the case where the toner density in the first developer is less than a specified value and where the toner density in the second developer is not less than the specified value under the judgment by the judging device that the first and second developers have same color, replenishing devices for replenishing toner to each of the first and second developers, and means for activating the replenishing device so as to continuously replenish toner to the first developer until the toner density therein reaches the specified v

Abstract: The present invention relates to an image forming apparatus with a developing device in which first and second detecting elements are provided respectively at opposite ends of the device to detect that substantially same amounts of developer are present in both ends. By this, the image forming apparatus is permitted to start image formation only when the developer is evenly dispersed in the both ends of the device.

Abstract: A copying machine having a premaintenance system for maintaining various parts thereof based upon a value to be set for premaintenance of them which is renewed to that reflecting the number of copies counted from the latest maintenance to the present maintenance at least one time, which comprises a counter for counting the number of copies, a memory for memorizing the value to be set for premaintenance, a key for instructing completion of each maintenance operation and a premaintenance control means for renewing the value of premaintenance based upon the present count value counted by the counter from the latest maintenance to the present one.

Abstract: An electrophotographic image forming apparatus capable of bringing one developing unit among a plurality of developing units thereof into an operative state.To accomplish the developing unit changeover operation in the least necessary time, control means accepts an image forming operation start signal during the developing unit changeover operation to start the image forming operation immediately after the completion of the developing unit changeover operation and accepts a selection signal selecting an another developing unit during the developing unit changeover operation.

Abstract: An recording apparatus of the present invention has a manual paper feed mechanism which includes a paper inlet, a timing roller and a paper outlet. When a paper is inserted into the paper inlet at a proper timing, the paper is recorded images thereon and then discharged out of the paper outlet. When the paper is inserted at an improper timing, for example, during the rotation of the timing roller, however, the paper is discharged out of the paper outlet without image recording thereon.

Abstract: A copying apparatus provided with an automatic paper feeding mechanism capable of feeding paper manually, wherein a manual paper feeding passage is connected to a copy paper transporting passage of the automatic paper feeding mechanism, and a plurality of sensors are provided in the way of paper feeding passage to detect the inserting state of a manually fed copy paper. When a manually fed copy paper is inserted to a predetermined position of the manual paper feeding passage, the sensors detect the state of insertion and display them to let an operator know that the copy paper has been inserted to the predetermined position and state an image forming operation. If the manually fed copy paper has been pulled out after the image forming operation was started, the image forming operation is executed on the minimum size of the copy paper.

Abstract: A copying machine with a predetermined variable magnification range is capable of providing a wider range of magnification values. The copying magnification desired can be entered into the copying machine and if the desired magnification data is out of the predetermined range, the machine can automatically calculate the number of times that a copy must be made and can also determine the magnification ratio for each copy to produce the desired final magnification value. The number of times that the copying process must be repeated with the copying paper being used as an original for each process can be displayed to the operator.

Abstract: A video projecting apparatus comprises a housing-like chassis which encases projecting lenses and cathode-ray tubes and is provided with a front portion having a movable reflecting mirror. With this video projecting apparatus, the reflecting mirror can be moved to an extended position for projection onto a screen and a contracted position in a front portion of the chassis by a driving mechanism attached to the reflecting mirror.

Abstract: A color video projector as disclosed which includes a cabinet having a depressed top deck, and a mirror carrying L-shape mounting board pivotally carried by a pair of slidably movable arms, guide grooves on the side edges of said top deck and guide pins protruding from the mounting board ride in the guide grooves during withdrawal of the mounting board. The board can only be rocked to its upright position when the arms are fully extended and can only be rocked back to its original position when the arms are fully extended and from which position the mounting board can be pushed back into the cabinet with the mirror above the top deck.